Montmorency On The Rocks: Doctor, Aristocrat, Murderer? - Eleanor Updale
This book is the second in this series, following on from Montmorency, and as with the previous volume, this book focusses on the exploits of the eponymous (anti)hero - however, in Montmorency on the Rocks, our protagonist is forced to widen his circle of trust to include others for the first time since his escape from prison.

Who else can discover the connection between an explosion at Kings Cross and a series of deaths on a desolate Scottish island other than Montmorency and his friends? Can our hero learn to trust other people, including the man who once saved his life? If not, this is going to be a very short book...

I enjoyed this very much, as was the case with Montmorency, so I'm looking forward to seeing where the author takes our hero in the two remaining books (while also keeping my fingers crossed for more...) - the series continues in Montmorency and the Assassins.